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Whenhesawallhisbooks
問題詳情:Whenhesawallhisbooks_____hereandthereonthefloor,heknewthatsomethingterrible_____.A.lying;musthavehappenedB.lie;musthappenC.lay;mighthavehappenedD.hadlain;couldhavehappen【回答】A知識點:動詞時態...
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